Which outcome arises from the presence of decaying organic matter within a pre-Columbian chinampa system?

💡 Explanation

When organic matter decays within the oxygen-poor confines of a chinampa, anaerobic decomposition occurs because methanogenic archaea consume organic carbon. Therefore methane gas production increases, rather than decreased nitrogen fixation, increased salinity, or decreased phosphorus availability which would need different conditions.

• Which inaccuracy arises due to refraction when measuring celestial body altitude near the horizon using an 18th-century sextant?
• Which structural vulnerability increased within late-Roman castra when defensive perimeters significantly expanded?
• During a Roman siege, which consequence results from using vinegar to weaken limestone fortifications?
• Which effect amplified the vulnerability of Roman castra fortifications against siege ladders?
• Which structural problem contributed to frequent rebuilds in early wooden sailing ships prone to hogging?
• Which navigational risk increased due to thermal expansion within 18th-century ship chronometers during extended tropical voyages?